IFX4949

General Product Characteristics

Data Sheet

7

Rev. 1.0, 2012-05-07

4.2

Functional Range

Note: Within the functional or operating range, the IC operates as described in the circuit description. The electrical

characteristics are specified within the conditions given in the Electrical Characteristics table.

4.3

Thermal Resistance

Note: This thermal data was generated in accordance with JEDEC JESD51 standards. For more information, go

to www.jedec.org.

Table 1

Pos.

Parameter

Symbol

Limit Values

Unit

Conditions

Min.

Max.

4.2.1

Input Voltage Range for Normal

Operation

V

IN

5.5

28

V

–

4.2.2

Extended Input Voltage Range

V

IN

3.5

40

V

1) The output voltage will follow the input voltage for input voltages below

V

V

2) Input voltages ranging from > 28 V up to 40 V may only be applied for transient periods

t

Pos.

Parameter

Symbol

Limit Values

Unit

Conditions

Min.

Typ.

Max.

IFX4949SJ (PG-DSO-8)

4.3.3

1) Not subject to production test, specified by design.

R

thJSP

–71

–

K/W

–

4.3.4

Junction to Ambient1)

R

thJA

–

116

–

K/W

2)

Specified

R

(Chip+Package) was simulated on a 76.2 x 114.3 x 1.5 mm board with 2 inner copper layers (2 x 70µm Cu, 2 x 35µm Cu).

4.3.5

–

172

–

K/W

3)

Specified

R

(Chip+Package) was simulated on a 76.2

4.3.6

–

145

–

K/W

area on PCB3)

4.3.7

–

139

–

K/W

area on PCB3)

Thermal Shutdown

4.3.8

Junction Temperature

T

JSD

–

165

–

°C

1)